package com.gym.controller;

import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import com.google.code.kaptcha.impl.DefaultKaptcha;

@Controller
public class KaptchaController {

	/**
	 * 1、验证码工具
	 */
	@Autowired
	DefaultKaptcha defaultKaptcha;
	
	/**
	 * 2、生成验证码
	 * @param httpServletRequest
	 * @param httpServletResponse
	 * @throws Exception
	 */
	@RequestMapping("/defaultKaptcha")
	public void defaultKaptcha(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse)
			throws Exception {
		byte[] captchaChallengeAsJpeg = null;
		ByteArrayOutputStream jpegOutputStream = new ByteArrayOutputStream();
		try {
			// 生产验证码字符串并保存到session中
			String createText = defaultKaptcha.createText();
			httpServletRequest.getSession().setAttribute("rightCode", createText);
			// 使用生产的验证码字符串返回一个BufferedImage对象并转为byte写入到byte数组中
			BufferedImage challenge = defaultKaptcha.createImage(createText);
			ImageIO.write(challenge, "jpg", jpegOutputStream);
		} catch (IllegalArgumentException e) {
			httpServletResponse.sendError(HttpServletResponse.SC_NOT_FOUND);
			return;
		}

		// 定义response输出类型为image/jpeg类型，使用response输出流输出图片的byte数组
		captchaChallengeAsJpeg = jpegOutputStream.toByteArray();
		httpServletResponse.setHeader("Cache-Control", "no-store");
		httpServletResponse.setHeader("Pragma", "no-cache");
		httpServletResponse.setDateHeader("Expires", 0);
		httpServletResponse.setContentType("image/jpeg");
		ServletOutputStream responseOutputStream = httpServletResponse.getOutputStream();
		responseOutputStream.write(captchaChallengeAsJpeg);
		responseOutputStream.flush();
		responseOutputStream.close();
	}

	/**
	 * 3、校对验证码
	 * @param httpServletRequest
	 * @param httpServletResponse
	 * @return
	 */
	@RequestMapping("/imgvrifyControllerDefaultKaptcha")
	public ModelAndView imgvrifyControllerDefaultKaptcha(HttpServletRequest httpServletRequest,
			HttpServletResponse httpServletResponse) {
		ModelAndView andView = new ModelAndView();
		String rightCode = (String) httpServletRequest.getSession().getAttribute("rightCode");
		String tryCode = httpServletRequest.getParameter("tryCode");
		String name = httpServletRequest.getParameter("name");
		String password = httpServletRequest.getParameter("password");
		System.out.println(name+"/"+password);
		System.out.println("正确的验证码:"+rightCode+"/用户所填的验证码:"+tryCode);
		if (!rightCode.equals(tryCode)) {
			andView.addObject("info", "验证码输入错误");
			andView.setViewName("UserLogin");
		} else {
			andView.setViewName("forward:/login_check");
		}
		return andView;
	}
	
	@RequestMapping("/toIndex")
	public String toIndex() {
		return "login";
	}
}
